本文主要是介绍ActionScript Class for Global Variables in Flexfle,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
ActionScript Class for Global Variables in Flex原文:
[url]http://www.kerkness.ca/?p=4[/url]
I’ve been reading several blogs and forums on how to implement global variables in a Flex application. It’s tough to find an effective example of how to do this as most threads/comments are flooded with people crying foul that good programming doesn’t need global variables.
While I agree for the most part I’m used to having some sort of config file in my applications which hold defined constants that are likely to change depending on the deployment or version of the application. Eg: In my php applications I keep database connection information in a config file so that i can easily switch between a development database or production database.
The best solution I’ve found to do this in a Flex Application is to include in the root directory of your Flex application a ActionScript class that contains properties for all the constants or global variables you’ll need to define.
Action Script : Settings.as
package
{
public class Settings
{
static public var SiteUrl:String="http://www.mydomain.com";
}
}
Example MXML File Using Settings.as
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
xmlns="*">
<mx:Script>
<![CDATA[
import mx.controls.Alert;
private function testSettings():void
{
Alert.show( Settings.SiteUrl );
}
]]>
</mx:Script>
<mx:Button label="test" click="testSettings()"/>
</mx:Application>
Important things to make note of in this example you’ll need xmlns=”*” in the opening tag of any MXML file or component which needs access to the properties of Settings.as. You’ll also need to make sure Settings.as is the root folder of your application.
这篇关于ActionScript Class for Global Variables in Flexfle的文章就介绍到这儿,希望我们推荐的文章对编程师们有所帮助!